In the 40 day guide newsletter thing, it says to get an SSL certificate for the domain that you set up CPV Labs on. Why does that matter?
i for once know that EWA offers require HTTPS so it only makes sense if you're using CPVLab to add SSL so you can https to your links 
That's because certain offers require a SSL pixel/postback
So if you want to place a pixel on your aff network you need to send an SSL link.